Bristle-free brushes use twisted metal springs or coils instead of individual bristles. That design eliminates the risk of loose bristles detaching and lets the tool clean tight places such as venturi tubes and grates.
Grill brushes are built from heavy-duty materials such as galvanized steel springs or stainless-steel spring wire. The twisted-in-wire coil design and heavy-gauge metal provide strength and resistance to bending.